CN111573953A - Method and device for treating waste lithium ion battery electrolyte - Google Patents
Method and device for treating waste lithium ion battery electrolyte Download PDFInfo
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- CN111573953A CN111573953A CN202010571706.9A CN202010571706A CN111573953A CN 111573953 A CN111573953 A CN 111573953A CN 202010571706 A CN202010571706 A CN 202010571706A CN 111573953 A CN111573953 A CN 111573953A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C68/00—Preparation of esters of carbonic or haloformic acids
- C07C68/08—Purification; Separation; Stabilisation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/54—Reclaiming serviceable parts of waste accumulators
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/84—Recycling of batteries or fuel cells
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Abstract
The invention discloses a method for treating waste lithium ion battery electrolyte, which comprises the following steps: s1, adding excessive alkaline substances into the electrolyte of the waste lithium ion battery; s2, filtering the waste lithium ion electrolyte; s3, leading the waste lithium ion electrolyte to a temperature-controllable rectifying device, and rectifying the combustible carbonic ester of each component according to respective boiling points; s4, leading each group of combustible carbonic ester to a condensing device respectively and carrying out recovery treatment; the invention also provides a device for treating the waste lithium ion battery electrolyte; the invention eliminates the corrosivity of the lithium ion electrolyte by adding the alkaline substance and reduces the toxicity of the lithium ion electrolyte; the processed electrolyte can replace coal to burn for providing heat, and can be used as fuel or used for other purposes, thereby changing waste into valuable.
Description
Technical Field
The invention relates to a new energy chemical treatment method, in particular to a method and a device for treating waste lithium ion battery electrolyte.
Background
1/5, the electrolyte accounts for the specific gravity of the lithium ion battery, and is one of the key materials of the lithium ion battery. However, the electrolyte has harsh storage conditions and short shelf life due to the particularity of the electrolyte, and the storage period is only 6 months. At present, expired and unqualified electrolyte cannot be directly discharged due to toxicity and corrosivity, and a proper method is not used for regeneration treatment, so that the problem in the industry is solved, and electrolyte manufacturers need to pay a cost for relevant organizations to carry out substitution treatment. And the mechanism for disposing the waste electrolyte needs special environment-friendly quality, is required to be consistent with the location of the electrolyte to be treated, and cannot be treated in different places, so that the mechanism for treating the waste electrolyte can be selected to treat the phoenix feather unicorn hairs, even has no feather hair. Some waste electrolyte is piled up in a warehouse for years, which not only occupies capital and storeroom, but also has the risk of leakage.
The electrolyte special for the lithium ion battery mainly comprises three parts, namely lithium salt, a solvent and an additive. The solvent is a carbonate mixed solution, which comprises chain carbonate and cyclic carbonate, and a small part of the functional electrolyte may also contain carboxylic ester. The solvent accounts for 75-90% of the electrolyte, and the ester solution is low-toxicity and combustible liquid. The specific weight of the additive in the electrolyte is small, about 0.5-10%, and can be ignored. The lithium salt that is mainly used at present is lithium hexafluorophosphate (LiPF)6) The lithium hexafluorophosphate accounts for 7-17% of the specific gravity of the electrolyte, and is the most difficult part to treat in the waste electrolyte, the lithium hexafluorophosphate is unstable, is easily decomposed at too high temperature or in water, and is easily decomposed to generate hydrofluoric acid (HF), and the hydrofluoric acid has toxicity and strong corrosivity, so the waste electrolyte has the risk of leakage in the long-term storage process. Lithium hexafluorophosphate and organic solvents are harmful to the environment and can contaminate domestic water if discharged directly.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a method and a device for treating the waste lithium ion battery electrolyte, which can remove the toxicity and the corrosivity of the waste lithium ion battery electrolyte and extract and recover combustible fuel in the waste lithium ion battery electrolyte.
In order to achieve the aim, the invention provides a method for treating waste lithium ion battery electrolyte, which comprises the following steps:
s1, adding excessive alkaline substances into the electrolyte of the waste lithium ion battery, uniformly stirring, standing for 4-8 hours, and removing HF and H in the electrolyte3PO4；
S2, filtering the waste lithium ion electrolyte processed in the step S1 to remove insoluble or slightly soluble substances in the waste lithium ion electrolyte;
s3, leading the waste lithium ion electrolyte filtered in the step S2 to a temperature-controllable rectifying device, and rectifying carbonic ester with combustible components in the waste electrolyte by the rectifying device according to respective boiling points;
s4, leading each group of combustible carbonic ester distilled in the step S3 to a condensing device respectively and carrying out recovery treatment.
Preferably, the basic substance in step S1 is Ca (OH)2Or CaCO3。
Preferably, the rectifying unit described in step S3 includes a reboiler and a distillation column in communication with the reboiler.
Preferably, the condensing device in step S4 is a condenser.
Compared with the prior art, the method for treating the waste lithium ion battery electrolyte has the beneficial effects that:
by adopting the method, the corrosivity of the lithium ion electrolyte is eliminated by adding the alkaline substance, and the toxicity of the lithium ion electrolyte is reduced; the processed electrolyte can replace coal to burn for providing heat, and can be used as fuel or used for other purposes, thereby changing waste into valuable.
The invention also provides a device for treating the waste lithium ion battery electrolyte, which comprises a stirring tank, a filter, a distillation device, a condensing device and at least one material storage tank, wherein the filter is arranged on one side of the stirring tank and is communicated with the stirring tank; the inside of agitator tank is provided with agitating unit, one side of agitator tank is provided with the feed inlet.
Preferably, the distillation apparatus comprises a reboiler in communication with the filter, and a distillation column in communication with the condensing means, the reboiler having a bottom in communication with a bottom of the distillation column, and the reboiler having a top in communication with a middle of the distillation column.
Preferably, a first control valve is arranged at a feed inlet of the reboiler communicated with the filter.
Preferably, the condensing device is a condenser.
Preferably, the number of the storage tanks is more than two, and a second control valve is arranged between the condensing device and each storage tank.
Compared with the prior art, the treatment device for the electrolyte of the waste lithium ion battery has the beneficial effects that:
the waste lithium ion electrolyte and the alkaline substance are conveyed into the stirring tank through the feed inlet, the waste lithium ion electrolyte and the alkaline substance are uniformly stirred through the stirring device, hydrofluoric acid and phosphoric acid in the waste lithium ion electrolyte are eliminated, the waste electrolyte is filtered through the filter to obtain insoluble or slightly soluble substances inside after reaction, the insoluble or slightly soluble substances are distilled through the distilling device according to the boiling point of each combustible substance, the combustible substances are cooled through the condensing device and are changed from gaseous state to liquid state to flow into the storage tank for recycling, the device can be used for eliminating the corrosivity of the lithium ion electrolyte and reducing the toxicity of the lithium ion electrolyte, the treated electrolyte can be used for burning coal to provide heat and becomes fuel or is used for other purposes, and therefore waste is changed into wealth.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a device for treating waste lithium ion battery electrolyte provided by the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The special electrolyte for the waste lithium ion battery mainly comprises three parts of lithium salt, a combustible solvent and an additive. The lithium salt is mainly lithium hexafluorophosphate, the solvent is a mixed solution of carbonic ester, and the lithium hexafluorophosphate is unstable and easy to decompose at overhigh temperature or in the presence of water, and the specific reaction is as follows:
LiPF6+H2O→POF3+LiF+2HF↑
PF5+H2O→POF3+2HF↑
POF3+H2O→PO2F+2HF↑
PO2F+2H2O→H3PO4+HF↑
from the above, it can be seen that lithium hexafluorophosphate is decomposed to easily generate hydrofluoric acid (HF) and phosphoric acid, which are toxic and highly corrosive, and the present invention provides a method for treating a waste lithium ion battery electrolyte to remove hydrofluoric acid (HF) and phosphoric acid and recover a flammable solvent, comprising the steps of:
s1, adding excessive alkaline substances into the electrolyte of the waste lithium ion battery, uniformly stirring, standing for 4-8 hours, and removing HF and H in the electrolyte3PO4；
Wherein in S1, if the basic substance is Ca (OH)2Then there are the followingThe reaction process of (1):
4Ca(OH)2+2HF+2H3PO4→Ca3(PO4)2+CaF2+8H2O
slaked lime Ca (OH)2Is the most common alkaline substance in life, has wide source and low price, and the reaction product Ca3(PO4)2、CaF2Are slightly soluble or insoluble in the solvent and can be removed by simple filtration.
If the basic substance is CaCO3Then, the following reaction processes are carried out:
CaCO3+2HF→CO2+CaF2+H2O
CaCO3+H3PO4→Ca(H2PO4)2+CO2+H2O
calcium carbonate (CaCO3) is also a common substance in daily life, has wide industrial application and low cost, and the reaction product Ca (H)2PO4)2、CaF2Are slightly soluble or insoluble in the solvent and can be removed by simple filtration.
S2, filtering the waste lithium ion electrolyte processed in the step S1 to remove insoluble or slightly soluble substances in the waste lithium ion electrolyte;
in step S2, if the basic substance is Ca (OH)2Then, the reaction product Ca should be filtered off3(PO4)2、CaF2If the basic substance is CaCO3Then, Ca (H) which is a reaction product should be filtered off2PO4)2、CaF2。
S3, leading the waste lithium ion electrolyte filtered in the step S2 to a temperature-controllable rectifying device, and rectifying carbonic ester with combustible components in the waste electrolyte by the rectifying device according to respective boiling points;
in step S3, the solvent is a mixed solution of carbonate, including chain carbonate and cyclic carbonate, such as ethylene carbonate (boiling point 248 ℃), propylene carbonate (boiling point 242 ℃), dimethyl carbonate (boiling point 90 ℃), diethyl carbonate (boiling point 126-128 ℃), methylethyl carbonate (boiling point 107 ℃), ethyl acetate (boiling point 77 ℃), propyl propionate (boiling point 122-124 ℃), propyl acetate (boiling point 101.6 ℃), ethyl propionate (boiling point 99.1 ℃), and the distillation apparatus can distill according to the boiling point of each carbonate, so as to facilitate subsequent recovery processing, wherein the distillation apparatus includes a reboiler and a distillation column communicated with the reboiler in the prior art.
S4, each group of combustible carbonic ester distilled in the step S3 is respectively led to a condensing device and recycled, wherein the condensing device is preferably a condenser in the prior art.
By adopting the method, the corrosivity of the lithium ion electrolyte is eliminated by adding the alkaline substance, and the toxicity of the lithium ion electrolyte is reduced; the processed electrolyte can replace coal to burn for providing heat, and can be used as fuel or used for other purposes, thereby changing waste into valuable.
Example two
As shown in fig. 1, the present invention further provides a device for treating waste lithium ion battery electrolyte, which comprises a stirring tank 1, a filter 2 installed on one side of the stirring tank 1 and communicated with the stirring tank 1, a distillation device 3 installed on one side of the filter 2 and communicated with the bottom of the filter 2, a condensing device 4 installed on one side of the distillation device 3 and communicated with the distillation device 3, and at least one material storage tank respectively installed on one side of the condensing device 4 and respectively communicated with the condensing device 4; the inside of agitator tank 1 is provided with agitating unit, one side of agitator tank 1 is provided with feed inlet 11, and wherein preferably including first storage tank 51 and second storage tank 52 in this embodiment, the feed inlet department that reboiler 31 and filter 2 are linked together is provided with first control valve 33, condensing equipment 4 and each be provided with second control valve 6 between the storage tank.
Specifically, the special electrolyte for the waste lithium ion battery mainly comprises three parts, namely lithium salt, a flammable solvent and an additive. The lithium salt is mainly lithium hexafluorophosphate, the solvent is a mixed solution of carbonic ester, and the lithium hexafluorophosphate is unstable and easy to decompose at overhigh temperature or in the presence of water, and the specific reaction is as follows:
LiPF6+H2O→POF3+LiF+2HF↑
PF5+H2O→POF3+2HF↑
POF3+H2O→PO2F+2HF↑
PO2F+2H2O→H3PO4+HF↑
from the above, it can be seen that lithium hexafluorophosphate is decomposed to easily generate hydrofluoric acid (HF) and phosphoric acid, and the hydrofluoric acid has toxicity and strong corrosivity, and the present invention provides a device for treating waste lithium ion battery electrolyte, which is used for removing hydrofluoric acid (HF) and phosphoric acid and recovering flammable solvent, and comprises the following steps:
s1, conveying the waste lithium ion electrolyte and the alkaline substance into the stirring tank 1 through the feed inlet 11, uniformly stirring the waste lithium ion electrolyte and the alkaline substance through the stirring device, standing for 4-8 hours, and removing HF and H in the waste lithium ion electrolyte and the alkaline substance3PO4；
Wherein in S1, if the basic substance is Ca (OH)2Then, the following reaction processes are carried out:
4Ca(OH)2+2HF+2H3PO4→Ca3(PO4)2+CaF2+8H2O
slaked lime Ca (OH)2Is the most common alkaline substance in life, has wide source and low price, and the reaction product Ca3(PO4)2、CaF2Are slightly soluble or insoluble in the solvent and can be removed by simple filtration.
If the basic substance is CaCO3Then, the following reaction processes are carried out:
CaCO3+2HF→CO2+CaF2+H2O
CaCO3+H3PO4→Ca(H2PO4)2+CO2+H2O
calcium carbonate (CaCO3) is also a common substance in daily life, has wide industrial application and low cost, and the reaction product Ca (H)2PO4)2、CaF2Are slightly soluble or insoluble in the solvent and can be removed by simple filtration.
S2, filtering the waste lithium ion electrolyte processed in the step S1 by a filter 2 to remove insoluble or slightly soluble substances in the waste lithium ion electrolyte;
in step S2, if the basic substance is Ca (OH)2Then, the reaction product Ca should be filtered off3(PO4)2、CaF2If the basic substance is CaCO3Then, Ca (H) which is a reaction product should be filtered off2PO4)2、CaF2。
S3, opening the first control valve 33, leading the waste lithium ion electrolyte filtered by the filter 2 to the temperature-controllable rectifying device 3, closing the first control valve 33, and rectifying the combustible carbonic ester of each component in the waste electrolyte by the rectifying device 3 according to the respective boiling point;
in step S3, the solvent is a mixed carbonate solution, and includes a chain carbonate and a cyclic carbonate, such as ethylene carbonate (boiling point 248 ℃), propylene carbonate (boiling point 242 ℃), dimethyl carbonate (boiling point 90 ℃), diethyl carbonate (boiling point 126 to 128 ℃), methylethyl carbonate (boiling point 107 ℃), ethyl acetate (boiling point 77 ℃), propyl propionate (boiling point 122 to 124 ℃), propyl acetate (boiling point 101.6 ℃), ethyl propionate (boiling point 99.1 ℃), and the distillation apparatus 3 can perform distillation according to the boiling point of each carbonate, thereby facilitating subsequent recovery processing.
Wherein the distillation apparatus 3 comprises a reboiler 31 communicating with the filter 2, and a distillation column 32 communicating with the condensing apparatus 4, a bottom of the reboiler 31 communicating with a bottom of the distillation column 32, and a top of the reboiler 31 communicating with a middle portion of the distillation column 32. The upper portion of rectifying column 32 is the rectifying section, and the lower part is the section of keeping somewhere, and after the waste electrolyte of certain pressure and temperature got into rectifying column 32, the light component was concentrated gradually at the rectifying section, left the top of the tower and flowed to subsequent condensing equipment 4, and the heavy ends was concentrated the back at the section of keeping somewhere, and partly as tower bottom liquid, partly then in reboiler 31 heats the back and send back to distillation column 32, provide the steam air current that a certain amount rises in succession for the distillation operation.
S4, each group of combustible carbonic ester distilled in the step S3 is respectively led to a condensing device 4 and recycled, wherein the condensing device 4 is preferably a condenser in the prior art.
Specifically, the combustible material is subjected to distillation treatment by the distillation device 3 according to the boiling point of each combustible material, is cooled by the condensation device 4 to change the gaseous state into the liquid state, and is respectively flowed into the first storage tank 51 or the second storage tank 52 under the control of the second control valve 6, so that the recovery operation is performed.
The device can eliminate the corrosivity of the lithium ion electrolyte and reduce the toxicity of the lithium ion electrolyte, and the treated electrolyte can replace coal to burn to provide heat to be used as fuel or used for other purposes, so that waste is changed into valuable.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (9)
1. A method for treating waste lithium ion battery electrolyte is characterized by comprising the following steps:
s1, adding excessive alkaline substances into the electrolyte of the waste lithium ion battery, uniformly stirring, standing for 4-8 hours, and removing HF and H in the electrolyte3PO4；
S2, filtering the waste lithium ion electrolyte processed in the step S1 to remove insoluble or slightly soluble substances in the waste lithium ion electrolyte;
s3, leading the waste lithium ion electrolyte filtered in the step S2 to a temperature-controllable rectifying device, and rectifying carbonic ester with combustible components in the waste electrolyte by the rectifying device according to respective boiling points;
s4, leading each group of combustible carbonic ester distilled in the step S3 to a condensing device respectively and carrying out recovery treatment.
2. The method according to claim 1, wherein the alkaline substance in step S1 is Ca (OH)2Or CaCO3。
3. The method as claimed in claim 1, wherein the rectification unit in step S3 comprises a reboiler and a distillation column in communication with the reboiler.
4. The method of claim 1, wherein the condensing device of step S4 is a condenser.
5. A processing device for waste lithium ion battery electrolyte is characterized by comprising a stirring tank (1), a filter (2) arranged on one side of the stirring tank (1) and communicated with the stirring tank (1), a distillation device (3) arranged on one side of the filter (2) and communicated with the bottom of the filter (2), a condensing device (4) arranged on one side of the distillation device (3) and communicated with the distillation device (3), and at least one storage tank respectively arranged on one side of the condensing device (4) and communicated with the condensing device (4); the stirring device is arranged in the stirring tank (1), and a feeding hole (11) is formed in one side of the stirring tank (1).
6. The apparatus for treating waste lithium ion battery electrolyte as claimed in claim 5, wherein the distillation apparatus (3) comprises a reboiler (31) in communication with the filter (2), and a distillation column (32) in communication with the condensing apparatus (4), wherein the reboiler (31) has a bottom in communication with the distillation column (32), and the reboiler (31) has a top in communication with the middle of the distillation column (32).
7. The apparatus for treating waste lithium ion battery electrolyte as claimed in claim 6, wherein the feed port of the reboiler (31) communicating with the filter (2) is provided with a first control valve (33).
8. The apparatus for disposing of spent lithium ion battery electrolyte according to claim 5, wherein the condensing means (4) is a condenser.
9. The apparatus for treating waste lithium ion battery electrolyte according to any one of claims 5 to 8, wherein the number of the storage tanks is two or more, and a second control valve (6) is provided between the condensing device (4) and each storage tank.
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| CN202010571706.9A CN111573953A (en) | 2020-06-22 | 2020-06-22 | Method and device for treating waste lithium ion battery electrolyte |
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| CN202010571706.9A CN111573953A (en) | 2020-06-22 | 2020-06-22 | Method and device for treating waste lithium ion battery electrolyte |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111883871A (en) * | 2020-09-04 | 2020-11-03 | 湖南金凯循环科技有限公司 | Waste lithium battery electrolyte recovery device |
| CN113471515A (en) * | 2021-06-30 | 2021-10-01 | 广州市浩立生物科技有限公司 | Method for recycling lithium battery electrolyte by combining supercritical extraction rectification and molecular distillation |
| CN114597412A (en) * | 2022-03-09 | 2022-06-07 | 厦门海辰新能源科技有限公司 | Application of positive electrode slurry containing fluorine-free binder in reduction of metal impurities in positive electrode plate |
-
2020
- 2020-06-22 CN CN202010571706.9A patent/CN111573953A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111883871A (en) * | 2020-09-04 | 2020-11-03 | 湖南金凯循环科技有限公司 | Waste lithium battery electrolyte recovery device |
| CN113471515A (en) * | 2021-06-30 | 2021-10-01 | 广州市浩立生物科技有限公司 | Method for recycling lithium battery electrolyte by combining supercritical extraction rectification and molecular distillation |
| CN114597412A (en) * | 2022-03-09 | 2022-06-07 | 厦门海辰新能源科技有限公司 | Application of positive electrode slurry containing fluorine-free binder in reduction of metal impurities in positive electrode plate |
| CN114597412B (en) * | 2022-03-09 | 2023-04-21 | 厦门海辰储能科技股份有限公司 | Use of positive electrode slurry containing fluorine-free binder in reducing metal impurities in positive electrode sheet |
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